fix _cudagraph_support introduced by #28479

Signed-off-by: MengqingCao <[email protected]>

Author: MengqingCao

vllm_ascend/worker/model_runner_v1.py

@@ -3866,8 +3866,8 @@ def initialize_aclgraph_capture(self) -> None:
                 graph_support = builder.aclgraph_support.value
                 builder_aclgraph = builder.aclgraph_support
             else:
-                graph_support = builder.cudagraph_support.value
-                builder_aclgraph = builder.cudagraph_support
+                graph_support = builder._cudagraph_support.value
+                builder_aclgraph = builder._cudagraph_support
             if graph_support < min_ag_support.value:
                 min_ag_support = builder_aclgraph
                 min_ag_builder_name = builder.__class__.__name__